- PID Autotune Library: [http://brettbeauregard.com/blog/2012/01/arduino-pid-autotune-library/](http://brettbeauregard.com/blog/2012/01/arduino-pid-autotune-library/) [https://playground.arduino.cc/Code/PIDAutotuneLibrary/](https://playground.arduino.cc/Code/PIDAutotuneLibrary/) - PID Library: [https://playground.arduino.cc/Code/PIDLibrary/](https://playground.arduino.cc/Code/PIDLibrary/) [https://github.com/br3ttb/Arduino-PID-Library/](https://github.com/br3ttb/Arduino-PID-Library/) [http://brettbeauregard.com/blog/2011/04/improving-the-beginners-pid-introduction/](http://brettbeauregard.com/blog/2011/04/improving-the-beginners-pid-introduction/)
